The Mouth Is the Orifice of the Digestive System. This means that what is going on with the tongue gives you a pretty good idea of what is going on in the gut. How well we digest food and drink shows up on the tongue. This is visible in the tongue coating and in the tongue color.
Primary groups: people who are emotionally close, know one another well and seek one another's company.he major characteristics of primary and secondary groups are with primary groups they are more close together like in best friends and all. Secondary groups are not that clos â¦ e and not together all the time. 14 people found this useful.
The difference between primary and secondary air pollutants is that primary air pollutants..? 1. enter the atmosphere directly, whereas secondary pollutants form from substances within the atmosphere 2. are the direct result of natural processes whereas secondary air pollutants are the result of human activity. 3. include ozone, whereas sulfur dioxide is an example of secondary air pollutants 4. are not... show more 1. enter the atmosphere directly, whereas secondary pollutants form from substances within the atmosphere 2. are the direct result of natural processes whereas secondary air pollutants are the result of human activity. 3. include ozone, whereas sulfur dioxide is an example of secondary air pollutants 4. are not harmful to humans whereas secondary air pollutants may be toxic to humans